The mother-of-five uploaded the cute family moment to her YouGossip page this week, alongside the caption: "Sooo cute, my two boys."
Sooo cute indeed!
Harvey is eleven years old and he's Katie's eldest son from her relationship with footballer Dwight Yorke. Jett is one and her first child with third husband Kieran Hayler.
Katie is also mum to son Junior and daughter Princess from her marriage to Peter Andre, and a newborn daughter with Kieran, whose name has to be publicly revealed.
The 36-year-old recently threw a party to celebrate Jett's first birthday, sharing some cute pictures from the event with fans - including one of Jett's airplane cake, made by Kieran's mum.
The pictures marked the first time Katie and Kieran had been pictured together since rekindling their romance following his affair with Katie's best friend.
In May, Katie was left heartbroken after discovering Kieran had been sleeping with her friend Jane Pountney. She immediately vowed to divorce him but later changed her mind, taking him back and working through their problems.
Although she has said if Kieran cheats again she'll dump him.